US2857184A - Fluid-seal construction - Google Patents

Fluid-seal construction Download PDF

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Publication number
US2857184A
US2857184A US612609A US61260956A US2857184A US 2857184 A US2857184 A US 2857184A US 612609 A US612609 A US 612609A US 61260956 A US61260956 A US 61260956A US 2857184 A US2857184 A US 2857184A
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Prior art keywords
ring
fluid
seal
recess
leg
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US612609A
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Jr Joseph J Mancusi
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Altair Inc
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Altair Inc
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/909—Similar sealing structures for mounting on piston and about rod
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/91—O-ring seal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/918—O-ring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/01—Materials digest

Definitions

  • This invention relates to fluid-seal constructions and more particularly to fluid-seal constructions for relatively movable surfaces.
  • Fluid-seal constructions between relatively movable surfaces are the source of considerable frictional resistance.
  • the problem is particularly acute where high pressures in the order of five thousand (5000) p. s. i. (pounds per square inch) are involved. It is compounded when a leakproof seal must be maintained over a Wide range of pressures, as from zero (0) to five thousand (5000) p. s. i.
  • a further object of the invention is to provide such a seal construction which also is leakproof over a wide range of pressures.
  • Another object of the invention is to provide a seal construction of the aforementioned character which also is simple of construction and easy of manufacture.
  • the invention resides in the advantageous use of a ring L-shaped in cross-section and made of a material having a low coefficient of friction with a relatively movable part, such as Teflon (tetrafluoroethylene polymer) or nylon (polyamide resin) when the relatively movable part is metal, and of an 0 ring generally round in cross-section and formed of a resilient material such as neoprene or rubber.
  • the L-shaped ring is so carried by one of two relatively movable mating parts that its one leg lies along the surface of the other part and with its free end pointed upstream.
  • the 0 ring is forcibly inserted between the one leg of the L-shaped ring and the carrying one of the relatively movable parts and through the internal stresses thereby set up forces the one leg of the L-shaped ring into sealing relation against the surface of the other part.
  • Fig. 1 is a vertical, sectional view of a fluid-seal con- 2 struction of the invention incorporated about a rod or shaft subjectable to rotary or axial displacement or both;
  • Fig. 2 is a perspective view of an L-shaped ring used in the invention.
  • Fig. 3 is a vertical, sectional view of a fluid-seal construction of the invention incorporated in a piston.
  • a metal rod or shaft 10 which may be subjected to rotary or axial displacement, is shown as slidably mounted within a bearing or bushing 12 forming part of the right-hand wall of a vessel or container adapted to hold fluid under high pressure of the order of five thousand p. s. i.
  • the bearing is recessed at 16 from its inner side and may first receive a metal ring 18 formed of a suitable back up or hearing material for the shaft 10. Next an L-shaped ring 20 is located within the recess.
  • This ring preferably formed of Teflon due to its durability and low coeflicient of friction with metal, is L-shaped in cross section. As seen in Fig. 2, it is generally hat shaped, With the long leg 20a of the ring constituting the inner cylindrical ring adapted to lie along the relatively movable metal surface of the shaft 10.
  • a resilient O ring 22 Seated behind and upon the ring 20 is a resilient O ring 22.
  • This ring preferably formed of neoprene, is forced in between the back surface of the cylindrical portion 20a of the L ring and the adjacent surface of the bearing recess 16. Because of being squeezed into place, the O ring, through the internal stresses set up in it, will conform with the contacting metal surface of the bearing recess 16 at 1 and with the contacting surface of L-shaped ring portion 20a at 2 to form seals. Seals will be effected about the shaft 10 at 3 due to the conformation of the Teflon ring 20 to the shaft under the influence of the stress forces in the 0 ring'22. It will be evident then at 2 a complete seal will obtain at the initial or low pressures and that the friction will be at a minimum because the sealing contact will occur mostly at point 3.
  • the advantages of the invention are not confined to its complete seal at low pressures with little friction; the complete seal obtains even at very high pressures, and surprisingly, without a corresponding increase in friction.
  • the O ring deforms under high pressure as it is forced against the metal ring 18 so that it engages the Teflon ring portion 20a over a wider area to cause additional sealing to take place between the ring 20 and the shaft 10 as at point 4.
  • there is not a generally corresponding increase in friction is not evident. It will, of course, be observed that as the O ring deforms under pressure, the sealing areas at 1 and 2 increase to provide adequate sealing at the higher pressures.
  • Fig. 3 shows the invention embodied in a piston seal.
  • a piston 30 is shown as slidably supported within a cylinder wall 32.
  • the piston is formed with an interiorly directed recess 34 which first receives the L-shaped in cross-section ring 36. Due to the fact that the relatively movable part, namely, the cylinder wall 32, now lies outside of the Teflon ring 36, the ring here used is not hat shaped; instead, the long leg 36a forms the exterior portion of the ring while the short leg thereof constitutes an inwardly directed portion.
  • the O ring 38 is placed in the recess 34 about the piston 30. It thus engages the exterior of the piston and the interior of the Teflon ring portion 36a. It is of such cross-section that when the piston is placed within the cylinder, the Teflon ring is forced into engagement with the cylinder wall and the subsequent mounting deforms the 0 ring to set up the internal stresses therein which form the necessary seals as explained in connection with Fig. 1.
  • a ring 40 is threaded upon the end of the piston.
  • the external diameter of this ring will be such as not to prevent the full application of fluid pressureto the O ring 38 and the L shaped in; cross-section ring 36. Sealing action for this construction would seem to be the same as for the embodiment of Fig. 1.
  • a first part formed with an interiorly directed recess, a second part movable relative to the first part and alongside said recess, a first fluidsealelement formed of flexible material having a low coefi'icient of friction with the second part and L-shaped in cross-section and seated in said recess so that one leg thereof lies along the end of said recess while the other leg of relatively thin construction lies along said second part, and a second fluid-seal element formed of resilient material and generally round in cross section and disposed in said recess behind said first element so as to leave the free end of the other leg exposed and so as to be subjected to compressive stresses which make it conform with the surfaces of the first part and of the first element and the first element with the surface of the second part, said second element being forced against the one leg lying along the end of said recess when contacted by fluid under pressure and thereby rendered further effective to make it conform with the surfaces of the first part and of the first element and the first element with the surface of the second

Description

Oct. 21, 1958- J. J. MANCUSI, JR
FLUID-SEAL CONSTRUCTION Filed Sept. 28, 1956 INVENTOR.
Joseph J, MancusL Jr:
yw z 657W ATTORNEY United States Patent FLUID-SEAL CONSTRUCTION Joseph J. Mancusi, Jr., Tuckahoe, N. Y., assignor to Altair Inc., Mount Vernon, N. Y., a corporation of New York Application September 28, 1956, Serial No. 612,609
2 Claims. (Cl. 286-26) This invention relates to fluid-seal constructions and more particularly to fluid-seal constructions for relatively movable surfaces.
Fluid-seal constructions between relatively movable surfaces are the source of considerable frictional resistance. The problem is particularly acute where high pressures in the order of five thousand (5000) p. s. i. (pounds per square inch) are involved. It is compounded when a leakproof seal must be maintained over a Wide range of pressures, as from zero (0) to five thousand (5000) p. s. i.
Accordingly, it is a primary object of this invention to provide a high-pressure fluid-seal construction for relatively movable surfaces that offers only a minimum of frictional resistance to their relative displacement.
A further object of the invention is to provide such a seal construction which also is leakproof over a wide range of pressures.
Another object of the invention is to provide a seal construction of the aforementioned character which also is simple of construction and easy of manufacture.
The invention resides in the advantageous use of a ring L-shaped in cross-section and made of a material having a low coefficient of friction with a relatively movable part, such as Teflon (tetrafluoroethylene polymer) or nylon (polyamide resin) when the relatively movable part is metal, and of an 0 ring generally round in cross-section and formed of a resilient material such as neoprene or rubber. The L-shaped ring is so carried by one of two relatively movable mating parts that its one leg lies along the surface of the other part and with its free end pointed upstream. The 0 ring is forcibly inserted between the one leg of the L-shaped ring and the carrying one of the relatively movable parts and through the internal stresses thereby set up forces the one leg of the L-shaped ring into sealing relation against the surface of the other part. It can be seen that, with a construction such as described, the development of pressure on the upstream side would set the rings and seem to perfect the seal due to the forces acting behind the L-shaped ring to force the one leg against the surface of the other part. With the build-up in pressure, there should be a proportionate increase in friction, as is well known.
It is a feature of applicants fluid-seal construction that this expected increase in friction does not occur. Admittedly, the coefficient of friction between materials such as Teflon and metal is quite low. Nevertheless, the friction which should have occurred when operating at high pressures has not materialized. This strange phenomenon would seem to be due to some unusual coaction or cooperation between the 0 and L-shaped rings and the associated relatively movable parts. The seal remains leakproof throughout.
These and other objects, features, and advantages will become apparent from a reading of the following specification when considered with the acompanying drawing in which:
Fig. 1 is a vertical, sectional view of a fluid-seal con- 2 struction of the invention incorporated about a rod or shaft subjectable to rotary or axial displacement or both;
Fig. 2 is a perspective view of an L-shaped ring used in the invention; and
Fig. 3 is a vertical, sectional view of a fluid-seal construction of the invention incorporated in a piston.
Referring to the drawing and especially to Figs. 1 and 2 thereof, a metal rod or shaft 10, which may be subjected to rotary or axial displacement, is shown as slidably mounted within a bearing or bushing 12 forming part of the right-hand wall of a vessel or container adapted to hold fluid under high pressure of the order of five thousand p. s. i. The bearing is recessed at 16 from its inner side and may first receive a metal ring 18 formed of a suitable back up or hearing material for the shaft 10. Next an L-shaped ring 20 is located within the recess.
This ring, preferably formed of Teflon due to its durability and low coeflicient of friction with metal, is L-shaped in cross section. As seen in Fig. 2, it is generally hat shaped, With the long leg 20a of the ring constituting the inner cylindrical ring adapted to lie along the relatively movable metal surface of the shaft 10.
Seated behind and upon the ring 20 is a resilient O ring 22. This ring, preferably formed of neoprene, is forced in between the back surface of the cylindrical portion 20a of the L ring and the adjacent surface of the bearing recess 16. Because of being squeezed into place, the O ring, through the internal stresses set up in it, will conform with the contacting metal surface of the bearing recess 16 at 1 and with the contacting surface of L-shaped ring portion 20a at 2 to form seals. Seals will be effected about the shaft 10 at 3 due to the conformation of the Teflon ring 20 to the shaft under the influence of the stress forces in the 0 ring'22. It will be evident then at 2 a complete seal will obtain at the initial or low pressures and that the friction will be at a minimum because the sealing contact will occur mostly at point 3.
But the advantages of the invention are not confined to its complete seal at low pressures with little friction; the complete seal obtains even at very high pressures, and surprisingly, without a corresponding increase in friction. Apparently, the O ring deforms under high pressure as it is forced against the metal ring 18 so that it engages the Teflon ring portion 20a over a wider area to cause additional sealing to take place between the ring 20 and the shaft 10 as at point 4. Just why there is not a generally corresponding increase in friction is not evident. It will, of course, be observed that as the O ring deforms under pressure, the sealing areas at 1 and 2 increase to provide adequate sealing at the higher pressures.
Fig. 3 shows the invention embodied in a piston seal. Here a piston 30 is shown as slidably supported within a cylinder wall 32. The piston is formed with an interiorly directed recess 34 which first receives the L-shaped in cross-section ring 36. Due to the fact that the relatively movable part, namely, the cylinder wall 32, now lies outside of the Teflon ring 36, the ring here used is not hat shaped; instead, the long leg 36a forms the exterior portion of the ring while the short leg thereof constitutes an inwardly directed portion.
After the Teflon ring 36, the O ring 38 is placed in the recess 34 about the piston 30. It thus engages the exterior of the piston and the interior of the Teflon ring portion 36a. It is of such cross-section that when the piston is placed within the cylinder, the Teflon ring is forced into engagement with the cylinder wall and the subsequent mounting deforms the 0 ring to set up the internal stresses therein which form the necessary seals as explained in connection with Fig. 1.
Since a piston is subjected to abrupt to and fro motion, it is best to secure the 0 ring against movement off accompanies the use of high pressures.
of the end of the piston. To this end, a ring 40 is threaded upon the end of the piston. The external diameter of this ring of course will be such as not to prevent the full application of fluid pressureto the O ring 38 and the L shaped in; cross-section ring 36. Sealing action for this construction would seem to be the same as for the embodiment of Fig. 1.
Evidently, then, there has been provided a new anduseful seal construction providing the advantages of complete seal at very high as well as low pressures with unexpectedly low friction qualities. Particularly significant is the elimination of the huge friction which normally The advantages ofhigh pressure systems in airplane controls and the like are well known and this invention overcomes the major hurdle confronting their use.
Itwillbe understood that the embodiments of the invention described are exemplary only and that other applications may be made thereof without departing from the scope of the invention which is intended to be defined by the appended claims.
What is claimed is:
1. In a seal construction, a first part formed with an interiorly directed recess, a second part movable relative to the first part and alongside said recess, a first fluidsealelement formed of flexible material having a low coefi'icient of friction with the second part and L-shaped in cross-section and seated in said recess so that one leg thereof lies along the end of said recess while the other leg of relatively thin construction lies along said second part, and a second fluid-seal element formed of resilient material and generally round in cross section and disposed in said recess behind said first element so as to leave the free end of the other leg exposed and so as to be subjected to compressive stresses which make it conform with the surfaces of the first part and of the first element and the first element with the surface of the second part, said second element being forced against the one leg lying along the end of said recess when contacted by fluid under pressure and thereby rendered further effective to make it conform with the surfaces of the first part and of the first element and the first element with the surface of the second part.
2. In a seal construction, a part generally round in cross-section, a second part encompassing said first part so as to mate with it, said parts being relatively movable, an interiorly directed recess formed in one of said parts so as to lie adjacent the mating surface of the other part, a first ring-like fluid-seal element formed of flexible material having a low coefficient of friction with the other part and L-shaped in cross section and seated in said recess so that one leg thereof lies along the end of said recess while the other leg of relatively thin construction lies along said other part, and a second ring-like fluidseal element formed of resilient material and generally round in cross section and disposed in said recess behind said first ring-like element so as to leave the free end of the other leg exposed and so as to be subjected to compressive stresses which make it conform with the surfaces of the one part and of the first element and the first element with the surface of the other part, said second element being forced against the one leg lying along the end of said recess when contacted by fluid under pressure and thereby rendered further effective to make it conform with the surfaces of the one part and of the first element and the first element with the surface of the second part.
References Cited in the file of this patent UNITED STATES PATENTS 2,494,598 Waring Jan. 17, 1950 2,784,013 Groen Mar. 5, 1957 FOREIGN PATENTS 170,175 Austria Jan. 25, 1952 1,049,256 France Aug. 10, 1953
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Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943711A (en) * 1958-09-15 1960-07-05 Gen Motors Corp Rod seal for shock absorber
US2998987A (en) * 1958-01-30 1961-09-05 Koppers Co Inc Teflon lip seal
US3011803A (en) * 1958-01-31 1961-12-05 Dumont Aviat Associates Swivel conduit joint
US3057630A (en) * 1958-08-08 1962-10-09 Sneed John Seal
US3088555A (en) * 1959-07-27 1963-05-07 Gen Motors Corp Shock absorber with sleeved piston
US3101955A (en) * 1961-09-28 1963-08-27 Lockheed Aircraft Corp Seal
US3105583A (en) * 1960-01-09 1963-10-01 Goetaverken Ab Conveyor track for heavy loads
US3109293A (en) * 1959-06-29 1963-11-05 Chemctron Corp Apparatus for handling liquefied gases
US3120967A (en) * 1961-08-14 1964-02-11 Johns Manville Coated grooves for pipe coupling
US3120789A (en) * 1961-05-29 1964-02-11 Res Specialties Co Pump construction
US3147983A (en) * 1960-06-03 1964-09-08 Northern Ordnance Inc Shaft and piston seal
US3208775A (en) * 1961-05-10 1965-09-28 Leer Ind Ltd Van Seal for bung bushings
US3218087A (en) * 1962-07-09 1965-11-16 Boeing Co Foot seal
US3261613A (en) * 1965-05-13 1966-07-19 Caterpillar Tractor Co High pressure fluid seals
US3299827A (en) * 1964-04-29 1967-01-24 Snam Spa Micropump head
DE1291204B (en) * 1961-10-09 1969-03-20 Borg Warner Sealing arrangement on the bearing bodies of a gear pump
US3446318A (en) * 1966-09-28 1969-05-27 Woodhead Mfg Co Ltd Suspension system and seal means therefor
US3835714A (en) * 1971-04-21 1974-09-17 Philips Corp Device comprising a liquid-supported rolling diaphragm seal
US4615261A (en) * 1984-10-29 1986-10-07 Stirling Thermal Motors, Inc. Stirling engine with improved piston ring assembly
US4862754A (en) * 1987-12-11 1989-09-05 Precision General, Inc. Portable piston style sample cylinder
US4927081A (en) * 1988-09-23 1990-05-22 Graco Inc. Rotary atomizer
US4930361A (en) * 1988-12-29 1990-06-05 Precision General, Inc. Portable piston style sample cylinder
US5380015A (en) * 1993-12-17 1995-01-10 Federal-Mogul Corporation Machined shaft seal encased in an elastomeric sleeve
US6299219B1 (en) 1996-01-23 2001-10-09 Remanco Hydraulics, Inc. Hydraulic swivel having a labyrinth seal
US6550822B2 (en) 2001-04-25 2003-04-22 G. B. Tubulars, Inc. Threaded coupling with water exclusion seal system
US6669205B2 (en) 2001-03-28 2003-12-30 Parker-Hannifin Corporation Retainer gasket with pressure relief vents
US6695357B2 (en) 2001-03-28 2004-02-24 Parker-Hannifin Corporation Threaded pipe connection having a retainer gasket with pressure relief vents
US20050046121A1 (en) * 2003-08-26 2005-03-03 Jones Jay M. Retainer gasket construction
US20050044689A1 (en) * 2003-08-26 2005-03-03 Yetter William P. Retainer gasket construction
US20060038357A1 (en) * 2004-08-23 2006-02-23 Kamibayashiyama Julian F Wedging retainer gasket construction
US20060066058A1 (en) * 2004-09-24 2006-03-30 Greene, Tweed Of Delaware, Inc. Cammed seal assembly with elastomeric energizer element
US20070228667A1 (en) * 2006-04-03 2007-10-04 Northrop Grumman Corporation Apparatus for preventing seal extrusion
US20100013220A1 (en) * 2008-07-16 2010-01-21 General Electric Company Extrusion resistant gasket face seal
US20110072634A1 (en) * 2005-04-08 2011-03-31 Kamibayashiyama Julian F Wedging retainer gasket construction
US20120038115A1 (en) * 2009-02-12 2012-02-16 Halliburton Energy Services, Inc. Anti-Extrusion Seal for High Temperature Applications
US8226359B1 (en) * 2006-06-16 2012-07-24 Jansen's Aircraft Systems Controls, Inc. Variable guide vane actuator with thermal management
US9086168B1 (en) 2012-08-28 2015-07-21 Jansen's Aircraft Systems Controls, Inc. GHe solenoid operated pressure regulator and gas release manifold
CN105673494A (en) * 2014-12-04 2016-06-15 Lg电子株式会社 Sealing member, scroll compressor including sealing member and method for manufacturing sealing member for a scroll compressor
US10596322B2 (en) 2011-09-15 2020-03-24 Oxford Nanopore Technologies Ltd. Pump
US10946418B2 (en) * 2018-08-21 2021-03-16 Wuhan China Star Optoelectronics Technology Co., Ltd. Scrubbing device and cleaning equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494598A (en) * 1947-06-16 1950-01-17 Alfred C Waring Hydraulic packing and seal
AT170175B (en) * 1950-04-26 1952-01-25 Karl Taglang Stop sleeve for sealing rods or shafts against liquids under pressure
FR1049256A (en) * 1951-01-18 1953-12-29 Improvement in joint forming devices
US2784013A (en) * 1953-12-21 1957-03-05 Bendix Aviat Corp Hydraulic seal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494598A (en) * 1947-06-16 1950-01-17 Alfred C Waring Hydraulic packing and seal
AT170175B (en) * 1950-04-26 1952-01-25 Karl Taglang Stop sleeve for sealing rods or shafts against liquids under pressure
FR1049256A (en) * 1951-01-18 1953-12-29 Improvement in joint forming devices
US2784013A (en) * 1953-12-21 1957-03-05 Bendix Aviat Corp Hydraulic seal

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998987A (en) * 1958-01-30 1961-09-05 Koppers Co Inc Teflon lip seal
US3011803A (en) * 1958-01-31 1961-12-05 Dumont Aviat Associates Swivel conduit joint
US3057630A (en) * 1958-08-08 1962-10-09 Sneed John Seal
US2943711A (en) * 1958-09-15 1960-07-05 Gen Motors Corp Rod seal for shock absorber
US3109293A (en) * 1959-06-29 1963-11-05 Chemctron Corp Apparatus for handling liquefied gases
US3088555A (en) * 1959-07-27 1963-05-07 Gen Motors Corp Shock absorber with sleeved piston
US3105583A (en) * 1960-01-09 1963-10-01 Goetaverken Ab Conveyor track for heavy loads
US3147983A (en) * 1960-06-03 1964-09-08 Northern Ordnance Inc Shaft and piston seal
US3208775A (en) * 1961-05-10 1965-09-28 Leer Ind Ltd Van Seal for bung bushings
US3120789A (en) * 1961-05-29 1964-02-11 Res Specialties Co Pump construction
US3120967A (en) * 1961-08-14 1964-02-11 Johns Manville Coated grooves for pipe coupling
US3101955A (en) * 1961-09-28 1963-08-27 Lockheed Aircraft Corp Seal
DE1291204B (en) * 1961-10-09 1969-03-20 Borg Warner Sealing arrangement on the bearing bodies of a gear pump
US3218087A (en) * 1962-07-09 1965-11-16 Boeing Co Foot seal
US3299827A (en) * 1964-04-29 1967-01-24 Snam Spa Micropump head
US3261613A (en) * 1965-05-13 1966-07-19 Caterpillar Tractor Co High pressure fluid seals
US3446318A (en) * 1966-09-28 1969-05-27 Woodhead Mfg Co Ltd Suspension system and seal means therefor
US3835714A (en) * 1971-04-21 1974-09-17 Philips Corp Device comprising a liquid-supported rolling diaphragm seal
US4615261A (en) * 1984-10-29 1986-10-07 Stirling Thermal Motors, Inc. Stirling engine with improved piston ring assembly
US4862754A (en) * 1987-12-11 1989-09-05 Precision General, Inc. Portable piston style sample cylinder
US4927081A (en) * 1988-09-23 1990-05-22 Graco Inc. Rotary atomizer
US4930361A (en) * 1988-12-29 1990-06-05 Precision General, Inc. Portable piston style sample cylinder
US5380015A (en) * 1993-12-17 1995-01-10 Federal-Mogul Corporation Machined shaft seal encased in an elastomeric sleeve
US6299219B1 (en) 1996-01-23 2001-10-09 Remanco Hydraulics, Inc. Hydraulic swivel having a labyrinth seal
US6669205B2 (en) 2001-03-28 2003-12-30 Parker-Hannifin Corporation Retainer gasket with pressure relief vents
US6695357B2 (en) 2001-03-28 2004-02-24 Parker-Hannifin Corporation Threaded pipe connection having a retainer gasket with pressure relief vents
US6550822B2 (en) 2001-04-25 2003-04-22 G. B. Tubulars, Inc. Threaded coupling with water exclusion seal system
US7401404B2 (en) 2003-08-26 2008-07-22 Parker-Hannifin Corporation Retainer gasket construction
US20050046121A1 (en) * 2003-08-26 2005-03-03 Jones Jay M. Retainer gasket construction
US20050044689A1 (en) * 2003-08-26 2005-03-03 Yetter William P. Retainer gasket construction
US20060038357A1 (en) * 2004-08-23 2006-02-23 Kamibayashiyama Julian F Wedging retainer gasket construction
US20060066058A1 (en) * 2004-09-24 2006-03-30 Greene, Tweed Of Delaware, Inc. Cammed seal assembly with elastomeric energizer element
US7341258B2 (en) * 2004-09-24 2008-03-11 Greene, Tweed Of Delaware, Inc. Cammed seal assembly with sealing ring having an angled leg portion and foot portion with elastomeric energizer element
US20110072634A1 (en) * 2005-04-08 2011-03-31 Kamibayashiyama Julian F Wedging retainer gasket construction
US20070228667A1 (en) * 2006-04-03 2007-10-04 Northrop Grumman Corporation Apparatus for preventing seal extrusion
US8226359B1 (en) * 2006-06-16 2012-07-24 Jansen's Aircraft Systems Controls, Inc. Variable guide vane actuator with thermal management
US20100013220A1 (en) * 2008-07-16 2010-01-21 General Electric Company Extrusion resistant gasket face seal
US8191933B2 (en) * 2008-07-16 2012-06-05 General Electric Company Extrusion resistant gasket face seal
US20120038115A1 (en) * 2009-02-12 2012-02-16 Halliburton Energy Services, Inc. Anti-Extrusion Seal for High Temperature Applications
US10596322B2 (en) 2011-09-15 2020-03-24 Oxford Nanopore Technologies Ltd. Pump
US10675412B2 (en) * 2011-09-15 2020-06-09 Oxford Nanopore Technologies Limited Piston seal
US9086168B1 (en) 2012-08-28 2015-07-21 Jansen's Aircraft Systems Controls, Inc. GHe solenoid operated pressure regulator and gas release manifold
CN105673494A (en) * 2014-12-04 2016-06-15 Lg电子株式会社 Sealing member, scroll compressor including sealing member and method for manufacturing sealing member for a scroll compressor
US9890861B2 (en) 2014-12-04 2018-02-13 Lg Electronics Inc. Sealing member, scroll compressor including a sealing member and method for manufacturing a sealing member for a scroll compressor
CN105673494B (en) * 2014-12-04 2018-04-13 Lg电子株式会社 Scroll compressor and its seal and the method for manufacturing seal
US10946418B2 (en) * 2018-08-21 2021-03-16 Wuhan China Star Optoelectronics Technology Co., Ltd. Scrubbing device and cleaning equipment

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